海上风电单桩基础沉桩过程焊缝疲劳分析  

Fatigue Analysis of Monopile During Driving Process for Offshore Wind Power

作　　者：宋启明 Song Qiming(Fujian Yongfu Power Engineering Co.,Ltd.,Fuzhou,China)

机构地区：[1]福建永福电力设计股份有限公司,福建福州

出　　处：《科学技术创新》2023年第1期196-199,共4页Scientific and Technological Innovation

摘　　要：海上风电单桩基础因结构简单、受力明确,加工制造和施工安装效率高使其成为最广泛采用的基础型式。单桩基础相对多桩基础总体刚度较弱,自振频率较低,在风机和波浪等动荷载作用下疲劳响应较明显,同时目前国内单桩基础均采用无过渡段型式,沉桩过程同样也会造成一定的疲劳损伤,但此阶段损伤往往被忽略了。以实际工程为依托,采用国内外不同规范算法,通过对沉桩过程的焊缝疲劳进行分析,根据分析结果给出建议指导实际工程应用。Monopile has become the most widely used foundation in offshore wind power due to its simple structure, manufacturing and installation efficiency. Compared with multi-pile foundation, the stiffness of monopile foundation is weak, and the natural vibration frequency is low, and the fatigue response is obvious under the dynamic load such as wind and wave. At present, the monopile foundation adopts the non-transition section type in China, and the pile driving process will also cause fatigue damage, but the damage is often ignored. Based on the actual project, this paper adopts different standard at home and abroad, analyzes the weld fatigue in the process of pile driving, and gives suggestions to guide the practical according to the analysis results.

关 键 词：海上风电 单桩基础 S-N曲线 疲劳损伤 

分 类 号：TU473[建筑科学—结构工程]